Organic electroluminescent structure and display device

Abstract

This disclosure relates to an organic electroluminescent structure and a display device. The organic electroluminescent structure includes a base substrate; a passivation protective layer provided at a side of the base substrate, in which the passivation protective layer is provided with a plurality of inner cutting portions arranged at intervals at a side facing away from the base substrate, each of the inner cutting portions has a first surface towards the base substrate and a second surface away from the base substrate, an orthographic projection of the first surface on the base substrate is within an orthographic projection of the second surface on the base substrate, and a groove is provided between two adjacent inner cutting portions and is formed as an inner cutting structure; an anode layer including a plurality of anodes arranged at intervals; an organic light-emitting functional layer having a hole injection layer.

What is claimed is: 
     
       1. An organic electroluminescent structure, comprising:
 a base substrate; 
 a passivation protective layer provided at a side of the base substrate, wherein a plurality of inner cutting portions arranged at intervals are provided at a side of the passivation protective layer facing away from the base substrate, each of the inner cutting portions has a first surface towards the base substrate and a second surface away from the base substrate, an orthographic projection of the first surface on the base substrate is within an orthographic projection of the second surface on the base substrate, there is a non-zero distance between an edge of the first surface and an edge of the second surface, and a groove is provided between two adjacent ones of the inner cutting portions and is formed as an inner cutting structure; 
 an anode layer comprising a plurality of anodes arranged at intervals, and each of the anodes is correspondingly provided on the second surface, an orthographic projection of the anode on the second surface is within the second surface and has a non-zero distance from the edge of the second surface; 
 an organic light-emitting functional layer having a hole injection layer, a thickness of the inner cutting portion is greater than that of the hole injection layer, the hole injection layer is partitioned into a plurality of hole injection blocks arranged at intervals by the inner cutting portions, and each of the hole injection blocks is correspondingly provided on the anode; and 
 a cathode layer provided at a side of the organic light-emitting functional layer facing away from the anode layer. 
 
     
     
       2. The organic electroluminescent structure according to  claim 1 , further comprising a metal composite layer having a plurality of metal composite portions arranged at intervals, each of the metal composite portions being connected with one of the anodes; wherein
 the metal composite portion comprises a metal protective film, a metal reflective film and a first conductive connection block sequentially stacked on the base substrate, wherein the metal reflective film is at a side of the inner cutting portion away from the anode, and the first conductive connection block passes through the inner cutting portion and is connected with the anode; 
 an orthographic projection of the metal reflective film on the base substrate is within an orthographic projection of the metal protective film on the base substrate, or is overlapped with the orthographic projection of the metal protective film on the base substrate; and 
 an orthographic projection of the first conductive connection block on the base substrate is within the orthographic projection of the first surface on the base substrate. 
 
     
     
       3. The organic electroluminescent structure according to  claim 2 , wherein a surface of the first conductive connection block close to the anode is higher than a bottom wall of the groove. 
     
     
       4. The organic electroluminescent structure according to  claim 2 , wherein an orthographic projection of the metal composite portion on the base substrate covers and is larger than an orthographic projection of the anode on the base substrate. 
     
     
       5. The organic electroluminescent structure according to  claim 2 , further comprising:
 a driving circuit disposed at a side of the metal composite layer close to the base substrate, wherein the driving circuit comprises a transistor having a semiconductor layer that is positioned inside the base substrate, and an orthographic projection of the semiconductor layer on the base substrate is within an orthographic projection of the metal composite portion on the base substrate; and 
 a second conductive connection block connected between the metal protective film and the metal composite layer. 
 
     
     
       6. The organic electroluminescent structure according to  claim 5 , wherein a width of the first conductive connection block is greater than that of the second conductive connection block. 
     
     
       7. The organic electroluminescent structure according to  claim 5 , wherein the transistor further comprises:
 a gate electrode disposed inside the passivation protective layer, an orthographic projection of the gate electrode on the base substrate is overlapped with the orthographic projection of the semiconductor layer on the base substrate, and the orthographic projection of the gate electrode on the base substrate is within the orthographic projection of the metal composite portion on the base substrate. 
 
     
     
       8. The organic electroluminescent structure according to  claim 2 , wherein the first conductive connection block is made of tungsten, and passivation protective layer is made of an inorganic material. 
     
     
       9. The organic electroluminescent structure according to  claim 1 , wherein in a direction from the first surface to the second surface, an area of a cross-section of the inner cutting portions gradually increases, and the cross-section is a plane parallel to the base substrate. 
     
     
       10. The organic electroluminescent structure according to  claim 9 , wherein the orthographic projection of the first surface on the base substrate is in a center area of the orthographic projection of the second surface on the base substrate. 
     
     
       11. A display device comprising the organic electroluminescent structure, wherein the organic electroluminescent structure comprises:
 a base substrate; 
 a passivation protective layer provided at a side of the base substrate, wherein a plurality of inner cutting portions arranged at intervals are provided at a side of the passivation protective layer facing away from the base substrate, each of the inner cutting portions has a first surface towards the base substrate and a second surface away from the base substrate, an orthographic projection of the first surface on the base substrate is within an orthographic projection of the second surface on the base substrate, there is a non-zero distance between an edge of the first surface and an edge of the second surface, and a groove is provided between two adjacent ones of the inner cutting portions and is formed as an inner cutting structure; 
 an anode layer comprising a plurality of anodes arranged at intervals, and each of the anodes is correspondingly provided on the second surface, an orthographic projection of the anode on the second surface is within the second surface and has a non-zero distance from the edge of the second surface; 
 an organic light-emitting functional layer having a hole injection layer, a thickness of the inner cutting portion is greater than that of the hole injection layer, the hole injection layer is partitioned into a plurality of hole injection blocks arranged at intervals by the inner cutting portions, and each of the hole injection blocks is correspondingly provided on the anode; and 
 a cathode layer provided at a side of the organic light-emitting functional layer facing away from the anode layer. 
 
     
     
       12. The display device according to  claim 11 , the organic electroluminescent structure further comprises a metal composite layer having a plurality of metal composite portions arranged at intervals, each of the metal composite portions being connected with one of the anodes; wherein
 the metal composite portion comprises a metal protective film, a metal reflective film and a first conductive connection block sequentially stacked on the base substrate, wherein the metal reflective film is at a side of the inner cutting portion away from the anode, and the first conductive connection block passes through the inner cutting portion and is connected with the anode; 
 an orthographic projection of the metal reflective film on the base substrate is within an orthographic projection of the metal protective film on the base substrate, or is overlapped with the orthographic projection of the metal protective film on the base substrate; and 
 an orthographic projection of the first conductive connection block on the base substrate is within the orthographic projection of the first surface on the base substrate. 
 
     
     
       13. The display device according to  claim 12 , wherein a surface of the first conductive connection block close to the anode is higher than a bottom wall of the groove. 
     
     
       14. The display device according to  claim 12 , wherein an orthographic projection of the metal composite portion on the base substrate covers and is larger than an orthographic projection of the anode on the base substrate. 
     
     
       15. The display device according to  claim 12 , wherein the organic electroluminescent structure further comprises:
 a driving circuit disposed at a side of the metal composite layer close to the base substrate, wherein the driving circuit comprises a transistor having a semiconductor layer that is positioned inside the base substrate, and an orthographic projection of the semiconductor layer on the base substrate is within an orthographic projection of the metal composite portion on the base substrate; and 
 a second conductive connection block connected between the metal protective film and the metal composite layer. 
 
     
     
       16. The display device according to  claim 15 , wherein a width of the first conductive connection block is greater than that of the second conductive connection block. 
     
     
       17. The display device according to  claim 15 , wherein the transistor further comprises:
 a gate electrode disposed inside the passivation protective layer, an orthographic projection of the gate electrode on the base substrate is overlapped with the orthographic projection of the semiconductor layer on the base substrate, and the orthographic projection of the gate electrode on the base substrate is within the orthographic projection of the metal composite portion on the base substrate. 
 
     
     
       18. The display device according to  claim 12 , wherein the first conductive connection block is made of tungsten, and passivation protective layer is made of an inorganic material. 
     
     
       19. The display device according to  claim 11 , wherein in a direction from the first surface to the second surface, an area of a cross-section of the inner cutting portions gradually increases, and the cross-section is a plane parallel to the base substrate. 
     
     
       20. The display device according to  claim 19 , wherein the orthographic projection of the first surface on the base substrate is in a center area of the orthographic projection of the second surface on the base substrate.